11 resultados para Olmsted, Harry Aborn, 1873-

em Boston University Digital Common


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Memoriam.

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http://www.archive.org/details/metlakahtltruena00davirich

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http://www.archive.org/details/pioneeringincong00spririch

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http://www.archive.org/details/westernmissionsa00smetrich

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http://www.archive.org/details/boundbrookoramyr00greeiala

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http://digilib.bu.edu/archive/strangerthanfict00halcrich/strangerthanfict00halcrich.djvu

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We study properties of non-uniform reductions and related completeness notions. We strengthen several results of Hitchcock and Pavan and give a trade-off between the amount of advice needed for a reduction and its honesty on NEXP. We construct an oracle relative to which this trade-off is optimal. We show, in a more systematic study of non-uniform reductions, that among other things non-uniformity can be removed at the cost of more queries. In line with Post's program for complexity theory we connect such 'uniformization' properties to the separation of complexity classes.

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It is useful in systems that must support multiple applications with various temporal requirements to allow application-specific policies to manage resources accordingly. However, there is a tension between this goal and the desire to control and police possibly malicious programs. The Java-based Sensor Execution Environment (SXE) in snBench presents a situation where such considerations add value to the system. Multiple applications can be run by multiple users with varied temporal requirements, some Real-Time and others best effort. This paper outlines and documents an implementation of a hierarchical and configurable scheduling system with which different applications can be executed using application-specific scheduling policies. Concurrently the system administrator can define fairness policies between applications that are imposed upon the system. Additionally, to ensure forward progress of system execution in the face of malicious or malformed user programs, an infrastructure for execution using multiple threads is described.